Regular: verb + ed. Walked, jumped, climbed
Word already ends in e: +d. lived, hated
Irregular: many diferent ones. It's a matter of learning
- Positive: I
walked to school yesterday
- Negative (something that didn't happen): Didn't + hele werkwoord: I didn't walk to school yesterday.
- Question: Did + hele werkwoord: did you walk to school yesterday
NB: the negative and questions sentences have "did/didn't" and then the whole verb. A bit strange, it's the past simple and you don't use a form of the past! But it is the truth. After did/didnt: whole verb, so NOT: "I didn't walked to school yesterday."